Brake apparatus for vehicles

ABSTRACT

A brake apparatus for vehicles having a wheel brake on each vehicle wheel, each wheel brake has a brake body non-rotatably connected to the vehicle wheel, a brake actuator that engages the brake body for braking purposes, and a brake anchor plate that contains the brake actuator and is fastened to the chassis. A sensor that is disposed on the brake anchor plate for detecting the wheel brake moment, the sensor is universally usable for various embodiments of the wheel brake and with the least possible alterations to the chassis, the sensor is embodied as a so-called pillow block force transducer that is adapted so that it constitutes at least one fastening element between the brake anchor plate and the chassis.

The invention is based on a brake apparatus for vehicles claim 1 typedefined in the preamble to claim 1.

In brake apparatuses for vehicles, the detection of the wheel brakemoments in the individual vehicle wheels by means of so-called brakemoment sensors is necessary in order to compensate for variances amongthe wheels during individual wheel braking by means of a brake momentcontrol, as well as in order to be able to exactly adjustindividual-wheel brake effects during drive slip control or to be ableto detect a locking of the vehicle wheel during antilock brake control(ABS) in conjunction with the friction coefficient slip curve.

In a known brake apparatus of the kind mentioned at the beginning in aslip-controlled brake system (DE 36 00 647 A1), the brake moment sensorthat has strain gauges at its disposal is inserted into the power fluxof the transfer of force from the shaft to the vehicle wheel, whereinthe sensor is embodied as a disk which is screwed to a wheel flange onone side and to a wheel rim on the other. The brake moment measured oran electrical signal that corresponds to the brake moment is output viaan inductive transmitter. Alternatively, in the known brake apparatus,the proposal is made to install the brake moment sensor also on thebrake anchor plate at a location that is deformed proportional to thebrake moment.

ADVANTAGES OF THE INVENTION

The brake apparatus for vehicles according to the invention, has theadvantage that the brake moment sensor, without modification, is suitedfor various embodiments of wheel brakes and can be used to sense brakemoment, for example, in both disk brakes and drum brakes. It is small,requires only slight modifications to the chassis or to the brake partsfor installation, and can be replaced with no trouble when defective.Since it has no direct access to hot brake parts, it functions reliablyand has a long service life.

The force transducer which is used according to the invention as a brakemoment sensor and whose function is based on the magneto-electric effector the press ductor principle, according to which the magneticproperties of particular steel alloys and other metal alloys change withthe influence of mechanical forces, is known as a so-called pillow blockforce transducer, which is used, for example, to control tensilestresses in mill trains. Since the two windings are disposed at rightangles to each other, no magnetic coupling is produced between them aslong as the metal block is not stressed. If the metal block is stressed,i.e. if a force is applied, then the magnetic field changes in such away that its permeability decreases in the direction of the force. Thisleads to an altered symmetry of the power flux, which in turn leads tothe fact that a part of the power flux in the secondary winding inducesa voltage that is proportional to the load up to a particular load. Theshear stress of the force transducer, which functions as a fasteningelement between the brake anchor plate and the chassis, is detected forthe brake moment sensing according to the invention. Since the totalvolume of the metal block produces the measurement effect, when there isan oblique or uneven introduction of force in contrast to strain gauges,an averaging advantageously occurs.

Advantageous improvements and updates of the brake apparatus disclosedare possible by means of the measures taken hereinafter.

According to one advantageous embodiment of the invention, on each ofthe side faces that extend parallel to the primary winding and face awayfrom each other, the metal block has a threaded pin protruding from it,which has an internal or external thread. This results in an extremelysmall force transducer, which must be calibrated, though, since strainsare produced in the metal block as a result of its being tightened byway of the threaded pins, which cause an error in the sensor signal.

According to a preferred embodiment of the invention, the metal block isembodied as a double T-shaped in longitudinal section and has a centerstrut and two lateral struts that are parallel to each other. The twowindings that cross each other are disposed in the center strut, whichis preferably quadrilateral in cross section and remote from the centerstrut, the threaded bores are let into each preferably plate-shapedlateral strut, with bore axes parallel to the center strut, forreceiving threaded bolts that are fixed on the chassis and brake anchorplate end. With this structural embodiment of the sensor, no influenceon the sensor region in the center strut can occur due to the screwconnection since the screw connection is carried out at a distance fromthe crossed windings and the shear force occurring at the forcetransducer is conducted in a parallel fashion by the two lateral struts.

According to another embodiment of the invention, the metal block isembodied as double π-shaped in longitudinal section and has two parallelcenter struts spaced apart from each other and two lateral struts thatare parallel to each other. A winding pair of the two windings thatcross each other is disposed in each center strut with a preferablyquadrilateral cross section, and threaded bores are let into eachpreferably plate-shaped lateral strut, with bore axes parallel to thecenter strut, for receiving threaded bolts that are fixed on the chassisend and brake anchor plate end, respectively. With this sensor, twoforce transducers are constituted by the two center struts onto whichthe shear forces introduced into the sensor are apportioned and whichsupply the redundant measurement results. This sensor can thus be usedwith higher safety requirements and for higher forces.

According to an advantageous embodiment of the invention, the threadedbores are contained in strip-like projections that extend along thelateral edges of the plate-shaped lateral struts remote from the centerstruts and these projections protrude from the lateral struts on sidesthat face each other, and are disposed opposite each other with a gapspace. A tilting of the lateral struts is limited by means of thesestrip-like projections, which are disposed opposite each other with onlya slight gap space.

According to another embodiment of the invention, the two plate-shapedlateral struts are connected to each other on their lateral edges remotefrom the center struts by means of outer braces, which each protrudebeyond the projections and their gap space and are of one piece with thelateral struts and projections. These two outer braces cause the shearforces acting on the sensor to be apportioned onto the center strut andthe two outer braces so that higher forces can be transmitted with thesensor.

According to an advantageous embodiment of the invention, the metalblock is covered on its top and bottom side, respectively, by an annulardisk with an annular width that approximately corresponds to the metalblock width. The two annular disks are connected to each other by meansof radial struts that are offset from one another by a circumferentialangle. The annular disks contain threaded bores for receiving threadedbolts that are fixed on the chassis and brake anchor plate end. Thisstructural embodiment of the sensor is particularly suited for drumbrakes and permits a very large transmission of force. For redundantmeasurement results, it is possible to dispose another metal block withthe windings that cross each other between the two annular disks,diametrically opposed to the first metal block.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be explained in detail in the description below inconjunction with exemplary embodiments represented in the drawings.

FIGS. 1 to 6 each schematically represent details of a side view of abrake apparatus for vehicles, with a wheel brake embodied as a diskbrake, and various embodiments of brake moment sensors,

FIG. 7 schematically represents a top view of a brake apparatus forvehicles, with a wheel brake embodied as a drum brake,

FIG. 8 schematically represents a side view of the brake apparatus inFIG. 7,

FIG. 9 schematically represents a top view of a brake apparatus forvehicles, with a wheel brake embodied as a drum brake, according toanother exemplary embodiment,

FIG. 10 schematically represents a side view of the brake apparatus inFIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The brake apparatuses for vehicles represented in details in FIGS. 1 to10 have in common the fact that each vehicle wheel is provided with awheel brake 10, which has a brake body 11 non-rotatably connected to thevehicle wheel, not shown here, a brake actuator 12 for engaging thebrake body 11 in order to brake, as well as a brake anchor plate 13 thatcontains the brake actuator. The brake anchor plate 13 is fastened tothe chassis 14, of which a steering knuckle 141 is depicted in FIGS. 1to 6 and a fastening flange 142 connected to the wheel axle 143 isdepicted in FIGS. 7 to 10. At least one brake moment sensor 15 isdisposed between the brake anchor plate 13 and the chassis 14 and isembodied as a pillow block force transducer whose function is based onthe known press ductor principle, i.e. the magneto-elastic effect,wherein the magnetic properties of particular steel alloys and othermetal alloys are influenced by means of external mechanical forces. Theforce transducer, called the sensor 15 for short below, therefore has alaminated metal block 16 with four through openings 17, which extendparallel to one another, are disposed at the corner points of animaginary square, and penetrate the metal block 16 parallel to its sidefaces, and has two windings 18, 19 that are guided through the throughopenings 17 at right angles to each other. In a laminated metal block16, the through openings 17 extend crosswise to the laminations. Theprimary winding 18 is supplied with alternating current and ameasurement voltage that is proportional to the power flux can be takenat the secondary winding 19. The force transducer or sensor 15constitutes at least one fastening element between the brake anchorplate 13 and the chassis 14 by virtue of the fact that on side facesthat face opposite directions from each other and extend parallel to theprimary winding 18, the metal block 16 is respectively fastened to thechassis 14 and to the brake anchor plate 13. The following steel alloysor metal alloys can be used for the metal block:

18 CrNi 8, 14 CrNi 18 (heat treatable chrome-nickel steels)

50 Fe, 50 Co (Vacuflux)

97 Fe, 3 Si

50 Fe, 50 Ni (also as a sintered metal)

rare earth alloys comprised of Fe with percentages of Tb and Dy

MnZn ferrites and NiZn ferrites.

The final decision for a particular material is a function of the forcerange to be measured, the sensor dimensions, and the coil dimensioning.

In the wheel brake that is embodied as a disk brake in FIGS. 1 to 6, thebrake body 11 is constituted by a brake disk 20, which is indicated withdot-and-dash lines and is non-rotatably connected to the vehicle wheel.The brake actuator 12 has two brake pistons 21, only shownschematically, which press against the brake disk 20 on the left andright sides during braking. The brake anchor plate 13 is embodied as aso-called caliper 22, which contains the brake pistons 21 and two eyes23, 24 for fastening to similar eyes 25, 26 on the chassis 14, on thesteering knuckle 141 in this instance.

In the exemplary embodiment of the brake apparatus in FIG. 1, thecaliper 22 is connected to the steering knuckle 141 by means of twosensors 15. Each sensor 15 has two threaded pins 27, 28 with externalthread for this purpose, which protrude at right angles from side facesthat extend parallel to the primary winding 18 and face away from eachother. The threaded pins 27 of the two sensors 15 are slid through theeyes 23, 24 on the caliper 22, while the threaded pins 28 of the twosensors 15 are slid through the eyes 25, 26 in the steering knuckle 141.Nuts 29 are threaded onto the threaded pins 27, 28 so that the two steelblocks 16 of the sensors 15 are pressed on the one hand against thecaliper 22 and on the other, against the steering knuckle 141. Whenbraking, the caliper 22 is carried along by the brake disk 20, whereinthe force with which the caliper 22 is carried along by the brake disk20 is proportional to the brake moment. When traveling forward andbackward, this force acts as a shear force on the two sensors 15, and anoutput voltage proportional to this force is taken from each of thesecondary windings 19. Instead of an external thread, the two threadedpins 27, 28 of the sensor 15 can also each have an axial, internallythreaded bore into which a headed screw is threaded, which has been slidthrough the associated eye.

With the above-described fastening of the caliper 22 to the chassis 14,the two sensors 15 achieve a redundancy in the brake moment measurement,which is sought for reasons of safety. Alternatively, though, by meansof a corresponding design of the windings, the steel material, and thedimensions, one of the two sensors 15 can also be used exclusively forthe more precise measurement of the lower partial braking range that isused most often. The other sensor 15 then handles only the measurementin more intense braking actions.

With the braking apparatus represented in FIG. 2, only a single sensor15 is provided between the caliper 22 and the chassis 14, and thissensor 15 is embodied as in FIG. 1 and is fastened in the eyes 23 and 25of the caliper 22 or the steering knuckle 141. A stay bolt 30 is screwedinto the other eye 26 in the steering knuckle 141, which eye is providedwith an internal thread 31, and the stay bolt protrudes with playthrough the other eye 24 in the caliper 22. The eye 24 is preferablyembodied as a longitudinal opening. In this embodiment of the brakeapparatus, the entire brake moment is absorbed by the one sensor 15. Thestay bolt 30 merely prevents a tilting of the caliper 22. Naturally, itis possible to provide the longitudinal opening guidance of the staybolt 30 in the steering knuckle 141 and to screw the stay bolt 30 intothe eye 24 in the caliper 22, which eye is provided with a correspondinginternal thread 31 for this purpose.

In the exemplary embodiment of the brake apparatus in FIG. 3, on theother hand, only one sensor 15 is provided, which is fastened with itsthreaded pins 27, 28 by means of the nuts 29 in the eyes 23 and 25 onthe caliper 22 or on the steering knuckle 141. The two other eyes 24, 26on the caliper 22 and the steering knuckle 141, which eyes are flushwith each other, are connected to one another by means of a fasteningbolt 32. The fastening bolt 32 has a spacer 321, whose axial lengthcorresponds to the width of the metal block 16. The caliper 22 and thesteering knuckle 141 are tightened against the spacer 321 by tighteningthe nuts 33. A force apportionment of the shear force that occurs duringbraking takes place with this brake apparatus. A brake forceapportionment of this kind can be necessary when there are particularlylarge brake moments, e.g. in trucks. The fastening bolt 32 should bethought of as part of the sensor 15 and must have correspondingly narrowtolerances.

The sensor 15 depicted in FIGS. 1 to 3 does have an extremely lowstructural volume, but it must be noted that the screw fasteninginfluences the sensor signal; because when screwing it in, strains areproduced in the metal block 16 so that a calibration is necessary here.The sensors 15 depicted in FIGS. 4 to 6, though, avoid an influencing ofthe sensor region by means of the screw fastening on the caliper 22 andthe steering knuckle 141.

With the sensor 15 depicted in FIG. 4, the metal block 16 is embodied asdouble T-shaped in longitudinal section and has a center strut 161 andtwo lateral struts and 164 that are parallel to each other. The centerstrut 161 constituted by a quadrilateral prism and the lateral struts163, 165 are constituted by quadrilateral plates connected in one pieceto the center strut. The primary winding 18 and the secondary winding 19are disposed in the center strut 161 and remote from the center strut161, threaded bores 33 are let into each lateral strut 163, 164, with abore axis parallel to the center strut 161. The threaded bores 33 arecontained in strip-like projections 165 that extend along the lateraledges of the plate-shaped lateral struts 163, 164 remote from the centerstrut and protrude from the lateral struts 163, 164 on sides that faceeach other, and are disposed opposite each other with a gap space.Headed screws 34, which are slid through the eyes 23 and 24 on thecaliper 22 and through the eyes 25 and 26 on the steering knuckle 141,are screwed into the threaded bores 33 of the sensor 15. As a result,the two plate-shaped lateral struts 163, 164 are attached to the caliper22 and to the chassis 14, the shear force is conveyed in a parallelfashion by means of the lateral struts 163, 164, and a tilting islimited by means of the two gaps between the projections 34. Duringbraking, the entire brake moment is absorbed by the sensor 15 so thatthe brake apparatus according to FIG. 4 is comparable in function to thebrake apparatus according to FIG. 2, but with the advantage that thescrew fastening does not have any influence on the sensor signal.

In the exemplary embodiment of the brake apparatus depicted in FIG. 5,the metal block 16 is embodied as double π-shaped in longitudinalsection and has two parallel center struts 161, 162 spaced apart fromeach other and two lateral struts 163 and 164 that are parallel to eachother. The center struts 161, 162 are in turn embodied as quadrilateralprisms and the lateral struts 163, 164 are embodied as plates, which areof one piece with the prisms and along their lateral edges, in turn,these plates carry the projections 165 that are disposed opposite eachother with a gap space. On the outer end in the region of the strips165, in turn, four threaded bores 33 are let into the two plate-shapedlateral struts 163, 164. Therefore the sensor 15 according to FIG. 5corresponds in design to the sensor 15 in FIG. 4 except for the twocenter struts 161 and 162. A winding pair of the two windings 18, 19that cross each other is disposed in each center strut 161, 162, whereinfor its part, the primary winding 18 is aligned parallel to the lateralstruts 163, 164. By means of the two center struts 161, 162, each withtwo windings 18, 19, two force transducers are realized, so to speak,for measuring shear forces produced when braking. The brake apparatus inFIG. 5 thus corresponds in its function to the brake apparatus depictedin FIG. 1, merely with the difference that the screw connection does nothave any influence on the sensor signals.

The sensor 15, which in the brake apparatus according to FIG. 6 fastensthe caliper 13 to the steering knuckle 141 of the chassis 14,corresponds in design to the sensor 15 in the brake apparatus accordingto FIG. 4, with the difference that the two plate-shaped lateral struts163, 164 are additionally connected to each other along their lateraledges by means of outer braces 166. The braces 166 respectively extendbeyond the projections 165 and their gap space and are of one piece withthe lateral struts 163, 164 and the projections 165. In this sensor 15,the shear force is apportioned onto the force transducer, i.e. thecenter strut 161, and the two additional braces 166. The sensor 15 cantherefore be used for higher forces. The braces 166 also serve to conveythe shear forces in parallel fashion. The sensor 15 can thus be used forlarge brake moments so that the brake apparatus according to FIG. 6represents an alternative to the brake apparatus according to FIG. 3.

In the brake apparatuses schematically represented in FIGS. 7 to 10, thewheel brake 10 is respectively embodied as a drum brake. The brake body11 is embodied as a brake drum 35, the brake actuator 12 has two brakeshoes 36, and the brake anchor plate 13 is embodied as a securing plate37 (FIGS. 8 and 10), upon which the two brake shoes 36 are pivotablysupported so that when the drum brake is activated, they press againstthe interior of the brake drum 35 with their brake pads 38. In thedepiction of FIGS. 7 and 9, the securing plate 37 is removed for thesake of clarity. The securing plate 37 has four through openings 39 forfastening in relation to the chassis, and for its part, the chassis isprovided with a fastening flange 142 that has four corresponding throughopenings 40 and is fixed to the wheel axle 143 of the chassis 14.

In the brake apparatus according to FIGS. 7 and 8, the securing plate 37is secured by way of two sensors 15. Each sensor is embodied identicallyto the sensor 15 depicted in and described in conjunction with FIG. 4.On the securing plate end and the fastening flange end, a headed screw41 is slid through each of the through openings 39 and the throughopenings 40, respectively, and is screwed into the threaded bores 33 inthe two lateral struts 163, 164 of the metal block 16. The brakeapparatus according to FIGS. 7 and 8 is suitable for smaller forces.Since the shear force measurement has very short path, a negligiblysmall alteration in the force direction occurs due to the brake moment.This effect is taken into account in the calibration of the brakeapparatus and is therefore eliminated.

The brake apparatus with a drum brake, which is depicted in FIGS. 9 and10, is in contrast designed for higher forces, wherein only one sensor15 is used, i.e. not two redundant sensors 15 as in FIGS. 7 and 8. Thesensor 15, which is disposed between the securing plate 37 and thefastening flange 142 and can be seen in a side view in FIG. 10 and in atop view in FIG. 9, is comprised for its part of the metal block 16,which is respectively covered on its top and bottom side by an annulardisk 42 and 43. The radial width of the annular disk 42 approximatelycorresponds to the depth or the width of the metal block 16. The twoannular disks 42, 43 are connected to each other by means of threeradial struts 44 that are offset from one another and from the metalblock 16 by the same circumferential angle. The length of the radialstruts 44 corresponds to the annular width. The metal block 16, theannular disks 42, 43, and the radial struts 44 are embodied as being ofone piece with one another. In the metal block 16 the two windings 18,19, which cross each other, are in turn guided through the four throughopenings 17 in the metal block 16. The two windings 18, 19 are not shownin the top view of the sensor 15 according to FIG. 9 for the sake ofclarity. Four threaded bores 45, which are respectively disposed offsetfrom one another by a 90° circumference angle, are let into both annulardisks 42, 43, and headed screws 41 are in turn screwed into them. As inthe drum brake in FIGS. 7 and 8, the headed screws 41 are slid throughcorresponding through openings 39 and 40, respectively, in the securingplate 37 and the fastening flange 142. When there are increased safetyrequirements and in order to produce redundant measurement results, thesensor 15 can be equipped with another force transducer, for example byvirtue of the fact that the radial strut 44 disposed diametricallyopposite the metal block 16 is replaced by another metal block 16 thathas the two crossing windings 18, 19.

The foregoing relates to preferred exemplary embodiments of theinvention, it being understood that other variants and embodimentsthereof are possible within the spirit and scope of the invention, thelatter being defined by the appended claims.

I claim:
 1. A brake apparatus for vehicles, comprising a wheel brake(10) on each vehicle wheel, said wheel brake has a brake body (11)non-rotatably connected to the vehicle wheel, a brake actuator (12) thatengages the brake body (11) for braking purposes, and a brake anchorplate (13) that contains the brake actuator (12) and is fastened to achassis (14), a sensor (15) that is disposed on the brake anchor plate(13) for detecting the wheel brake moment, the sensor (15) is a forcetransducer that uses a magneto-elastic effect, said sensor has alaminated or solid metal block (16) with four through openings (17) thatextend parallel to side walls and to each other, said through openingspass through the metal block (16), two windings (18, 19) are guided atright angles to each other through the through openings (17), of which aprimary winding (18) is supplied with alternating current and ameasurement voltage that is proportional to the power flux in the metalblock (16) can be measured at a secondary winding (19), and that thesensor (15) constitutes at least one fastening element between the brakeanchor plate (13) and the chassis (14), due to the fact that the metalblock (16) is secured respectively to the chassis (14) and the brakeanchor plate (13) on side faces that extend parallel to the primarywinding (18) and face away from each other.
 2. The apparatus accordingto claim 1, in which on each of the side faces that are directed awayfrom each other, the metal block (16) has a threaded pin (27, 28) thatprotrudes from the brake anchor plate and has an external or internalthread.
 3. The apparatus according to claim 1, in which the metal block(16) is embodied as a double T-shape in longitudinal section and has acenter strut (161) that is quadrilateral in cross section and twoplate-shaped lateral struts (163, 164) that are parallel to each other,that the primary and secondary windings (18, 19) are disposed in thecenter strut (161), and that remote from the center strut (161), closeto each free end of the lateral struts (163, 164), threaded bores (33)with bore axes parallel to the center strut (161) are let into eachlateral strut (163, 164) and these bores are for containing threadedbolts (34) attached on the chassis end or the brake anchor plate end. 4.The apparatus according to claim 1, in which the metal block (16) isembodied as double T-shaped in longitudinal section and has two parallelcenter struts (161, 162), which have a quadrilateral cross section andare spaced apart from each other, and two plate-shaped lateral struts(163, 164), which are parallel to each other, that a winding pair of theprimary and secondary windings (18, 19), which are aligned at rightangles to each other, is disposed in each center strut (161, 162), andthat remote from the center struts (161, 162), close to each free end ofthe lateral struts (163, 164), threaded bores (33) with bore axesparallel to the center struts (161, 162) are let into each lateral strut(163, 164), and these bores are for containing threaded bolts (34)attached on the chassis end or the brake anchor plate end.
 5. Theapparatus according to claim 4, in which the threaded bores (33) arecontained in strip-like projections (165) that extend along the lateraledges of the plate-shaped lateral struts (163, 164) remote from thecenter struts and protrude from the lateral struts on sides that faceeach other, and are disposed opposite each other with a gap space. 6.The apparatus according to claim 5, in which the two plate-shapedlateral struts (163, 164) are connected to each other on their lateraledges remote from the center struts by means of outer braces (166), inwhich each extend beyond the projections (165) and their gap space, andare of one piece with the lateral struts (163, 164) and the projections(165).
 7. The apparatus according to claim 1, in which metal block (16)is respectively covered on a top and a bottom side by an annular disk(42, 43) with a radial width that approximately corresponds to the widthof the metal block, that the two annular disks (42, 43) are connected toeach other by means of radial struts (44), which are offset from oneanother by a circumferential angle and whose length corresponds to theannular width, that contain threaded bores (33), which are offset fromone another by the same circumference angle and are for containingthreaded bolts (41) fixed on the chassis end and the brake anchor plateend, are let into both annular disks (42, 43), and that the metal block(16), the annular disks (42, 43), and the radial struts (44) areembodied as being of one piece with one another.
 8. The apparatusaccording to claim 2, in which for a wheel brake (10) embodied as a diskbrake, the brake body (11) is a brake disk (20), the brake actuator (12)has at least one brake piston (21), and the brake anchor plate (13) isembodied as a caliper (22), which has two eyes (23, 24) for fastening tosimilar eyes (25, 26) embodied on the chassis (14), in which thethreaded pins (27, 28) of two sensors (15) are each secured by means ofnuts (29) or screws in two eyes (23, 24 or 25, 26) that are flush witheach other and are disposed on the caliper end and the chassis end, orthat the threaded pins (27, 28) of the sensor (15) are secured by meansof nuts (29) or screws in two eyes (23 or 25) that are flush with eachother and are disposed on the caliper end and the chassis end and thetwo other eyes (24, 26) that are flush with each other and are disposedon the caliper end and the chassis end are connected to each otherrigidly by means of a fastening bolt (32) or are connected to each otherin floating fashion by means of a stay bolt (30), by virtue of the factthat the stay bolt (30) is secured in the one eye (26) and protrudeswith play into the other eye (24), which is preferably embodied as alongitudinal opening.
 9. The apparatus according to claim 3, in which awheel brake (10) that is embodied as a disk brake, the brake body (11)is a brake disk (20), the brake actuator (12) has at least one brakepiston (21), and the brake anchor plate (13) is embodied as a caliper(22), which has two eyes (23, 24) for fastening to similar eyes (25, 26)embodied on the chassis (14), in which a headed screw (34) is slidthrough each eye (23 to 26) on the caliper end and on the chassis endand is screwed into threaded bores (33) in the metal block (16) of thesensor (15).
 10. The apparatus according to claim 3, in which for awheel brake (10) that is embodied as a drum brake, the brake body (11)is a brake drum (35), the brake actuator (12) has two brake shoes (36),and the brake anchor plate (13) is embodied as a securing plate (37),which carries the two brake shoes (36) in a pivotable fashion and hasthrough openings (39) for fastening to a fastening flange (142) disposedon the chassis end, in which headed screws (41) are respectively slidthrough the through openings (39) in the securing plate (37) and similarthrough openings (40) in the fastening flange (142) of the chassis (14)and are screwed into threaded bores (33) in the metal blocks (16) of twosensors (15) disposed in diametrical opposition relative to the brakedrum axis.
 11. The apparatus according to claim 7, in which for a wheelbrake (10) that is embodied as a drum brake, the brake body (11) is abrake drum (35), the brake actuator (12) has two brake shoes (36), andthe brake anchor plate (13) is embodied as a securing plate (37), whichcarries the two brake shoes (36) in a pivotable fashion and has throughopenings (39) for fastening to a fastening flange (42) disposed on thechassis end, in which headed screws (41) are respectively slid throughthe through openings (39) in the securing plate (37) and similar throughopenings (40) in the fastening flange (42) of the chassis (14) and arescrewed into the threaded bores (33) in the annular disks (42, 43) ofthe sensor (15).
 12. The apparatus according to claim 4, for a wheelbrake (10) that is embodied as a disk brake in which the brake body (11)is a brake disk (20), the brake actuator (12) has at least one brakepiston (21), and the brake anchor plate (13) is embodied as a caliper(22), which has two eyes (23, 24) for fastening to similar eyes (25, 26)embodied on the chassis (14), in which a headed screw (34) is slidthrough each eye (23 to 26) on the caliper end and on the chassis endand is screwed into threaded bores (33) in the metal block (16) of thesensor (15).
 13. The apparatus according to claim 4, for a wheel brake(10) that is embodied as a drum brake, in which the brake body (11) is abrake drum (35), the brake actuator (12) has two brake shoes (36), andthe brake anchor plate (13) is embodied as a securing plate (37), whichcarries the two brake shoes (36) in a pivotable fashion and has throughopenings (39) for fastening to a fastening flange (142) disposed on thechassis end, in which headed screws (41) are respectively slid throughthe through openings (39) in the securing plate (37) and similar throughopenings (40) in the fastening flange (142) of the chassis (14) and arescrewed into threaded bores (33) in the metal blocks (16) of two sensors(15) disposed in diametrical opposition relative to the brake drum axis.14. The apparatus according to claim 5, for a wheel brake (10) that isembodied as a disk brake in which the brake body (11) is a brake disk(20), the brake actuator (12) has at least one brake piston (21), andthe brake anchor plate (13) is embodied as a caliper (22), which has twoeyes (23, 24) for fastening to similar eyes (25, 26) embodied on thechassis (14), in which a headed screw (34) is slid through each eye (23to 26) on the caliper end and on the chassis end and is screwed intothreaded bores (33) in the metal block (16) of the sensor (15).
 15. Theapparatus according to claim 5, for a wheel brake (10) that is embodiedas a drum brake, in which the brake body (11) is a brake drum (35), thebrake actuator (12) has two brake shoes (36), and the brake anchor plate(13) is embodied as a securing plate (37), which carries the two brakeshoes (36) in a pivotable fashion and has through openings (39) forfastening to a fastening flange (142) disposed on the chassis end, inwhich headed screws (41) are respectively slid through the throughopenings (39) in the securing plate (37) and similar through openings(40) in the fastening flange (142) of the chassis (14) and are screwedinto threaded bores (33) in the metal blocks (16) of two sensors (15)disposed in diametrical opposition relative to the brake drum axis. 16.The apparatus according to claim 6, for a wheel brake (10) that isembodied as a disk brake in which the brake body (11) is a brake disk(20), the brake actuator (12) has at least one brake piston (21), andthe brake anchor plate (13) is embodied as a caliper (22), which has twoeyes (23, 24) for fastening to similar eyes (25, 26) embodied on thechassis (14), in which a headed screw (34) is slid through each eye (23to 26) on the caliper end and on the chassis end and is screwed intothreaded bores (33) in the metal block (16) of the sensor (15).
 17. Theapparatus according to claim 6, for a wheel brake (10) that is embodiedas a drum brake, in which the brake body (11) is a brake drum (35), thebrake actuator (12) has two brake shoes (36), and the brake anchor plate(13) is embodied as a securing plate (37), which carries the two brakeshoes (36) in a pivotable fashion and has through openings (39) forfastening to a fastening flange (142) disposed on the chassis end, inwhich headed screws (41) are respectively slid through the throughopenings (39) in the securing plate (37) and similar through openings(40) in the fastening flange (142) of the chassis (14) and are screwedinto threaded bores (33) in the metal blocks (16) of two sensors (15)disposed in diametrical opposition relative to the brake drum axis.